QT vs ColdTrace
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
QT
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QT code has the characteristics of high security, concealment, fast recognition and minimal size. It is an excellent anti-counterfeiting code.
ColdTrace
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To maintain the quality of vaccines throughout the delivery process, they must be stored in the 2-8 degrees Celsius range. Yet, an estimated 75% of vaccines are exposed to harmful temperatures by the time they make it through the supply chain, increasing the likelihood of being ineffective upon delivery. Our focus is to strengthen the vaccine supply chain by identifying the weakest points and customizing improved routes for more efficient and equitable distribution of vaccines—ultimately bringing rates of exposure to harmful temperatures down to zero.
Screenshots
Verdict
The clearest difference is iOS requirement: QT at 10 against ColdTrace's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
QT ships an update every 2 months, ColdTrace every 5 weeks. The most recent releases landed on September 16, 2026 and September 27, 2026 respectively.
| Parameter | QT | ColdTrace |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10 — better | 15.0 |
| Further details — not scored | ||
| Size | 33 MB | 3 MB |
| Age rating | 17+ | 4+ |
| Developer | BSN (HK) Limited | Nexleaf Analytics |
In-app purchases
QT
No in-app purchases
ColdTrace
No in-app purchases
